Motor-driven door latch for vehicle

A motor-driven door ratchet for a vehicle, the door ratchet comprising:

• a catch configured to be rotatably installed to have a locking groove through which a striker mounted on a vehicle body is inserted to be caught or is removed;
• a pawl rotatably mounted to enter a rotation trajectory of the catch to stop rotation of the catch or to deviate from the rotation trajectory of the catch to allow the catch to be freely rotatable, wherein a pawl arm protruding from a first side surface is formed in the pawl, the catch and the pawl being part of a catch part that is configured to lock a vehicle door to the vehicle body;
• a main motor configured to be rotatable in a clockwise and counterclockwise direction, the main motor including a first driving gear, wherein the catch part can be locked or released from the striker by applying a rotational force to the catch part through the main motor;
• a first driven gear engaged in the first driving gear;
• a pawl release lever configured to include a second driven gear engaged in the first driven gear to rotate the pawl while rotating through a driving gear of the main motor, the first driven gear, and the second driven gear;
• an emergency door release part that includes an auxiliary motor, the emergency door release part configured to allow the auxiliary motor to be operated to open the vehicle door from the vehicle body through the catch part;
• an inside emergency operation lever connected to an inside handle installed in the vehicle door, the inside emergency operation lever configured to be rotated by receiving a manipulation force to allow the vehicle door to be opened by applying torque to the catch part;
• an outside emergency operation lever connected to an outside handle installed in the vehicle door, the outside emergency operation lever configured to be rotated by receiving a manipulation force to allow the vehicle door to be opened by applying torque to the catch part;
• and
• a door latch controller configured to detect collision through a collision detection sensor to apply an operation signal to the auxiliary motor when the main motor is inoperable due to a collision accident of the vehicle;
• wherein the emergency door release part comprises:
• an emergency auxiliary motor configured to include a driving screw;
• a driven screw lever engaged with the driving screw to move according to rotation of the driving screw;
• an emergency key lever coupled to the driven screw lever to move together therewith;
• and
• a master locking link connected to the emergency key lever together therewith to be connected to the outside emergency operation lever.

A vehicle comprising:

• a vehicle body;
• a collision detection sensor;
• a striker mounted on the vehicle body;
• a vehicle door rotatably connected to the vehicle body;
• a catch part configured to lock the vehicle door to the vehicle body by being caught by the striker or to be detached from the striker to allow the vehicle door to be opened from the vehicle body;
• a door locking and release part that includes a main motor, the door locking and release part configured to allow the catch part to be locked or released from the striker by applying a rotational force to the catch part through the main motor;
• an emergency door release part that includes an auxiliary motor, the emergency door release part configured to allow the auxiliary motor to be operated to open the vehicle door from the vehicle body through the catch part;
• an inside emergency operation lever connected to an inside handle installed in the vehicle door, the inside emergency operation lever configured to be rotated by receiving a manipulation force to allow the vehicle door to be opened by applying torque to the catch part;
• an outside emergency operation lever connected to an outside handle installed in the vehicle door, the outside emergency operation lever configured to be rotated by receiving a manipulation force to allow the vehicle door to be opened by applying torque to the catch part;
• and
• a door latch controller configured to detect collision through the collision detection sensor to apply an operation signal to the auxiliary motor when the main motor is inoperable due to a collision accident of the vehicle.